CN101247053B - Battery-connected voltage-boosting and reducing converting circuit and device, DC back-up power device - Google Patents
Battery-connected voltage-boosting and reducing converting circuit and device, DC back-up power device Download PDFInfo
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- CN101247053B CN101247053B CN2008100656227A CN200810065622A CN101247053B CN 101247053 B CN101247053 B CN 101247053B CN 2008100656227 A CN2008100656227 A CN 2008100656227A CN 200810065622 A CN200810065622 A CN 200810065622A CN 101247053 B CN101247053 B CN 101247053B
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Abstract
The present invention relates to a battery access ascending/descending voltage converting circuit and device and a direct current back-up power source. The battery access ascending/descending voltage converting circuit comprises a linear voltage stabilizing circuit (4) and a Boost voltage boosting circuit (6); wherein the linear voltage stabilizing circuit (4) comprises a linear voltage stabilizing circuit (41), a switch and a linear voltage stabilizing adjusting element, the incoming end of the battery is connected to the input end of the linear voltage stabilizing circuit through the switch and the linear voltage stabilizing adjusting element. The output end of the linear voltage-stabilizing circuit (4) is connected to the input end of the Boost voltage boosting circuit (6), and the output end of the Boost voltage boosting circuit (6) is a load connecting end. The linear voltage stabilizing circuit comprises a voltage reducing adjusting point and the Boost voltage boosting circuit comprises a voltage boosting adjusting point, when the voltage at the battery end is higher than the voltage reducing adjusting point the linear voltage stabilizing circuit works and the Boost voltage boosting circuit is straightly switched on. When the voltage at the battery end is lower than the voltage boosting adjusting point, the Boost voltage boosting circuit works and the linear voltage stabilizing circuit is straightly switched on. The battery access ascending/descending voltage converting circuit which is implemented with the invention has the advantages of high circuit efficiency, low cost, high reliability, simple debugging and the like.
Description
Technical field
The present invention relates to power technology, more particularly, relate to a kind of battery and insert with buck translation circuit and device.
Background technology
Storage class equipment is because of the importance of its data record and backup, and generally reliability, the stability to its power supply has very high requirement.In order to guarantee that when the AC network power down, in time Backup Data all requires equipment to have back-up source (battery) usually, for satisfying the voltage stabilizing requirement of equipment, must add the voltage stabilizing translation circuit simultaneously at battery and equipment room.Generally taking into account under cost and the considering of discharge time, often selecting the battery rated voltage battery suitable for use, choosing the 12V battery when powering to hard disk with power devices voltage.And at present, the push-pull circuit of the common multiselect of the circuit form of this type of voltage stabilizing translation circuit Buckboost, Cuk step-up/step-down circuit or band isolating transformer etc., i.e. when battery-end is pressed greater than voltage of voltage regulation (battery is in all, floating charge state), the regulated converter step-down is worked; When battery-end is pressed less than voltage of voltage regulation, the regulated converter work of boosting.
This class design has following deficiency:
1) circuit working efficient is low.As when big electric current (360W/30A) output, adopt the converter overall efficiency of Buckboost booster circuit about 72%, adopt the converter overall efficiency about 69% of the push-pull circuit of band isolating transformer.Efficient is hanged down the power-on time in the time of will having a strong impact on powered battery, thereby influences the protection operation after power consumption equipment exchanges power down;
2) circuit cost height.No matter adopt Buckboost or push-pull circuit, need plural metal-oxide-semiconductor at least, push-pull circuit also will increase isolating transformer and output rectifying tube;
3) reliability is low.Because component number is many, circuit reliability must reduce.
Summary of the invention
The technical problem to be solved in the present invention is, at the high defective of foregoing circuit inefficiency, the circuit cost of prior art, utilizes the battery self-characteristic, designs a kind of battery access buck translation circuit.In addition, the present invention also provides a kind of dc back-up power supply device and a kind of free-standing battery to insert and uses the buck converting means.
On the one hand, the present invention constructs a kind of battery access and uses the buck translation circuit, comprises linear voltage-stabilizing circuit and Boost booster circuit; Wherein said linear voltage-stabilizing circuit comprises linear voltage stabilization control circuit and switch and linear voltage stabilization regulating element, the battery incoming end links to each other with the input of described linear voltage-stabilizing circuit by switch and linear voltage stabilization regulating element, the output of described linear voltage-stabilizing circuit links to each other with the input of described Boost booster circuit, the output of described Boost booster circuit with for the load link; Described linear voltage-stabilizing circuit has step-down to be adjusted a little, and described Boost booster circuit has to boost to be adjusted a little, when being higher than described step-down, described battery-end pressure adjusts a little, and linear voltage-stabilizing circuit work, described Boost booster circuit is straight-through; Force down in described boosting when described battery-end and to adjust a little, described Boost booster circuit work, described linear voltage-stabilizing circuit is straight-through.
In battery of the present invention inserts with the buck translation circuit, described switch and linear voltage stabilization regulating element are that battery inserts metal-oxide-semiconductor, wherein, the drain electrode of described battery access metal-oxide-semiconductor links to each other with the positive pole of battery incoming end, source electrode links to each other with the input of Boost booster circuit, grid links to each other with the control output of linear voltage stabilization control circuit.
In battery of the present invention inserted with the buck translation circuit, the described step-down point voltage of adjusting was higher than described boosting and adjusts a little.
In battery of the present invention inserts with the buck translation circuit, be parallel with first electrochemical capacitor between the input of the output of described linear voltage-stabilizing circuit and described Boost booster circuit.
On the other hand, the invention provides a kind of dc back-up power supply device, comprise battery and battery access buck translation circuit, described battery inserts and comprises linear voltage-stabilizing circuit and Boost booster circuit with the buck translation circuit; Wherein said linear voltage-stabilizing circuit comprises linear voltage stabilization control circuit and switch and linear voltage stabilization regulating element, battery links to each other with the input of described linear voltage-stabilizing circuit by switch and linear voltage stabilization regulating element, the output of described linear voltage-stabilizing circuit links to each other with the input of described Boost booster circuit, and the output of described Boost booster circuit is the load link; Described linear voltage-stabilizing circuit has step-down to be adjusted a little, and described Boost booster circuit has to boost to be adjusted a little, when being higher than described step-down, described battery-end pressure adjusts a little, and linear voltage-stabilizing circuit work, described Boost booster circuit is straight-through; Force down in described boosting when described battery-end and to adjust a little, described Boost booster circuit work, described linear voltage-stabilizing circuit is straight-through.
In dc back-up power supply device of the present invention, described switch and linear voltage stabilization regulating element are that battery inserts metal-oxide-semiconductor, wherein, the drain electrode of described battery access metal-oxide-semiconductor links to each other with the positive pole of battery, source electrode links to each other with the input of Boost booster circuit, grid links to each other with the control output of linear voltage stabilization control circuit.
In dc back-up power supply device of the present invention, be parallel with first electrochemical capacitor between the input of the output of described linear voltage-stabilizing circuit and described Boost booster circuit.
Another aspect, the invention provides a kind of battery access buck converting means, comprise that battery inserts connector, coad connector and battery access buck translation circuit, described battery inserts and comprises linear voltage-stabilizing circuit and Boost booster circuit with the buck translation circuit; Wherein said linear voltage-stabilizing circuit comprises linear voltage stabilization control circuit and switch and linear voltage stabilization regulating element, battery inserts connector and links to each other with the input of described linear voltage-stabilizing circuit by switch and linear voltage stabilization regulating element, the output of described linear voltage-stabilizing circuit links to each other with the input of described Boost booster circuit, and the output of described Boost booster circuit links to each other with coad connector; Described linear voltage-stabilizing circuit has step-down to be adjusted a little, and described Boost booster circuit has to boost to be adjusted a little, when being higher than described step-down, described battery-end pressure adjusts a little, and linear voltage-stabilizing circuit work, described Boost booster circuit is straight-through; Force down in described boosting when described battery-end and to adjust a little, described Boost booster circuit work, described linear voltage-stabilizing circuit is straight-through.
In battery of the present invention inserts with the buck converting means, described switch and linear voltage stabilization regulating element are that battery inserts metal-oxide-semiconductor, wherein, the drain electrode of described battery access metal-oxide-semiconductor links to each other with the positive pole that battery inserts connector, source electrode links to each other with the input of Boost booster circuit, grid links to each other with the control output of linear voltage stabilization control circuit.
In battery of the present invention inserts with the buck converting means, be parallel with first electrochemical capacitor between the input of the output of described linear voltage-stabilizing circuit and described Boost booster circuit.
Implement battery access of the present invention and use the buck converting means, have following beneficial effect with buck translation circuit, dc back-up power supply device and battery access:
1) circuit efficiency height.As under output same load (360W/30A) condition, this programme efficient is higher than nearly 7 percentage points of Buckboost scheme;
2) circuit cost is low, the reliability height.Adopt the component number of this programme will be less than employing Buckboost greatly and recommend scheme, and debugging is simple, reliability improves.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is that battery of the present invention inserts the structural representation with the buck translation circuit;
Fig. 2 is that battery of the present invention inserts the circuit theory diagrams with buck translation circuit embodiment.
Embodiment
The present invention utilizes battery-end to press to be higher than its rated voltage duration weak point, load capacity is weak and battery-end is forced down in its rated voltage longer duration, the characteristic that load capacity is strong, design is suitable for the step-up/step-down circuit of battery input, so that provide stable voltage for power consumption equipment (as storage class equipment).The present invention realizes by circuit structure shown in Figure 1.
Figure 1 shows that battery of the present invention inserts the structural representation with the buck translation circuit.As shown in Figure 1, battery inserts and comprises linear voltage-stabilizing circuit 4 and Boost booster circuit 6 with the buck translation circuit.The input of linear voltage-stabilizing circuit 4 is connected with battery 1, output is connected with the input of Boost booster circuit 6.The output of Boost booster circuit 6 is connected with load 8.Linear voltage-stabilizing circuit 4 comprises switch and linear voltage stabilization regulating element and linear voltage stabilization control circuit 41, when the buck translation circuit is in the step-down operating state, after the output voltage of 41 pairs of linear voltage-stabilizing circuits 4 of linear voltage stabilization control circuit is sampled, is handled, for switch and linear voltage stabilization regulating element provide the step-down control signal.Boost booster circuit 6 comprises Boost main circuit (comprising inductance L, diode D and metal-oxide-semiconductor Q2) and Boost control circuit 61, be in when boosting operating state at the buck translation circuit, after the output voltage of 61 pairs of Boost booster circuits 6 of Boost control circuit is sampled, is handled, for the Boost main circuit provides the control signal of boosting.
In one embodiment, switch and linear voltage stabilization regulating element can be that battery inserts metal-oxide-semiconductor Q1, and its drain electrode links to each other with the positive pole of battery 1, source electrode links to each other with the input of Boost booster circuit 6, grid links to each other with the control output of linear voltage stabilization control circuit 41.In other embodiments, switch and linear voltage stabilization regulating element other switching devices such as triode, IGBT also.
The operation principle that battery of the present invention inserts with the buck translation circuit is to utilize the external characteristic of battery, and the buck translation circuit is designed to three kinds of operating states:
1) step-down operating conditions, promptly battery is in all, relays during floating charge state electricity, needs decompression transformation this moment.Although usually press can be greater than its rated voltage (being generally 1.1～1.2 times battery rated voltage) for the end of battery under equal, floating charge state, if but in case remove charging voltage, its end pressure can drop to rated voltage at short notice, and as if battery discharge this moment, this process will be rapider.That is to say that the buck translation circuit is operated in time of step-down attitude can be very short, is uneconomic for so extremely of short duration too much circuit of process input therefore.The present invention adopts the simple linear voltage-stabilizing circuit of form.When battery-end is pressed when adjusting greater than step-down, linear circuit work, otherwise will lead directly to.Because this process is very short, so although the efficient of linear voltage-stabilizing circuit is not high, its effectiveness affects to the entire cell discharge process is very little, can ignore.
2) straight-through operating conditions, promptly when in the precision of voltage regulation scope of cell voltage at the equipment requirements supply power voltage, do not increase other unnecessary losses in order to increase work efficiency to greatest extent, the buck translation circuit with cell voltage through to equipment, by battery directly to power devices.
3) operating conditions that boosts, promptly when cell voltage was lower than beyond the equipment requirements supply power voltage precision of voltage regulation, the buck translation circuit began the work of boosting.Because battery and equipment do not have insulation request, simplify most consideration with maximizing efficiency equally based on circuit, the present invention has adopted the simplest Boost booster circuit of structure.Adopt another benefit of Boost booster circuit to be, can not add and revise the above-mentioned straight-through attitude of ground realization.Promptly as long as the voltage from battery through to equipment (battery-end is pressed and deducted line loss voltage) is higher than adjusting a little of Boost booster circuit, the Boost booster circuit itself is exactly a direct circuit.
As is known to the person skilled in the art, by the parameter of each components and parts in the circuit is suitably selected, can obtain suitable step-down and adjust a little and boost and adjust a little.
As selection, the straight-through attitude of such scheme in the middle of can removing is about to adjusting of the work of boosting and designs to such an extent that equate with adjusting of step-down work or higher.In addition, also can not adopt the mode of linear voltage stabilization to realize the step-down operating conditions, such as the mode that adopts series diode on the line or metal-oxide-semiconductor, utilize the conduction voltage drop of diode or the body diode of metal-oxide-semiconductor own to increase the line voltage distribution loss, so that output voltage satisfies the power consumption equipment requirement.Press when having dropped in the power consumption equipment allowed band short circuit diode or open metal-oxide-semiconductor and reduce line voltage distribution loss etc. when detecting battery-end.
Fig. 2 is that battery of the present invention inserts the circuit theory diagrams with buck translation circuit one embodiment.In the present embodiment, the Boost main circuit comprises inductance L 1, diode D1 and metal-oxide-semiconductor Q2, the second electrochemical capacitor C2.Be parallel with the first electrochemical capacitor C1 that is used for voltage stabilizing between the input of the output of linear voltage-stabilizing circuit 4 and Boost booster circuit 6.Because linear voltage-stabilizing circuit, Boost booster circuit and operation principle thereof belong to the prior art that those skilled in the art know, so locate to repeat no more.
In the present embodiment, the step-down of battery-end input voltage (being designated as Va), linear voltage-stabilizing circuit boosting of point (being designated as Vb), Boost booster circuit point (being designated as Vc), the cell voltage line loss (being designated as Vd) during via the straight-through work of linear voltage-stabilizing circuit of adjusting of adjusting, line loss (being designated as Ve) when cell voltage leads directly to work via the Boost booster circuit, the output of whole voltage stabilizing circuit are adjusted a little, that is to say that the relation between the power consumption equipment supply power voltage (being designated as Vf) is as follows:
A, Va are variable, and Vd, Ve are variable (size have relation with load current, and promptly electric current is big more, and line loss is big more), and all the other are invariant;
B, usually, Vb＞Vc;
C, as Va＞Vb, linear voltage-stabilizing circuit step-down work, metal-oxide-semiconductor Q1 is operated in linear zone, its output voltage is Vb (corresponding this moment metal-oxide-semiconductor Q1 go up pressure drop Va-Vb); And the Boost booster circuit is straight-through, and metal-oxide-semiconductor Q2 ends, and voltage is Ve via the line drop of L1, D1, so the time Vf=Vb-Ve, corresponding to the step-down operating conditions;
D, as Va≤Vb, linear voltage-stabilizing circuit leads directly to work, metal-oxide-semiconductor Q1 is operated in the saturation conduction district, voltage is Vd via the line drop of metal-oxide-semiconductor Q1, so the time output voltage of circuit after via linear voltage-stabilizing circuit be Va-Vd; And the difference of Boost booster circuit between the work of boosting is depended on when Vb and Vc are provided with in the above-mentioned b condition:
D1:(Va-Vd-Ve)＞Vc, the then also straight-through work of Boost booster circuit, metal-oxide-semiconductor Q2 ends, and voltage is Ve via the line drop of L1, D1, this moment output voltage V f=Va-Vd-Ve, corresponding to straight-through operating conditions (being that linear voltage-stabilizing circuit and Boost booster circuit all are operated in straight-through attitude);
D2:(Va-Vd-Ve)≤Vc, the then Boost booster circuit voltage stabilizing work of boosting, metal-oxide-semiconductor Q2 is operated in the switch attitude, this moment Vf=Vc, corresponding to the operating conditions that boosts (be the straight-through work of linear voltage-stabilizing circuit, and the work of boosting of Boost booster circuit).
Especially, if design to such an extent that adjust that a Vc equates or lower with boosting in the design, just there has not been straight-through operating conditions in the then whole buck translation circuit to a step-down Vb that adjusts.
Need to prove, battery of the present invention inserts can be arranged on to power consumption equipment with the buck translation circuit and provides in the dc back-up power supply device of non-isolation of back-up source, in battery is installed in same shell or rack, be that power consumption equipment provides stable power with (power consumption equipment) rated voltage.Also can be made into the free-standing battery access that has battery access connector and coad connector and use the buck converting means, be used to connect direct current backup battery and power consumption equipment, be that power consumption equipment provides stable power with (power consumption equipment) rated voltage.
Claims (9)
1. a battery inserts and uses the buck translation circuit, it is characterized in that, comprises linear voltage-stabilizing circuit (4) and Boost booster circuit (6); Wherein said linear voltage-stabilizing circuit (4) comprises linear voltage stabilization control circuit (41) and switch and linear voltage stabilization regulating element, the battery incoming end links to each other with the input of described linear voltage-stabilizing circuit by switch and linear voltage stabilization regulating element, the output of described linear voltage-stabilizing circuit (4) links to each other with the input of described Boost booster circuit (6), and the output of described Boost booster circuit (6) is the load link; Described linear voltage-stabilizing circuit has step-down to be adjusted a little, and described Boost booster circuit has to boost to be adjusted a little, and described step-down is adjusted and a little is higher than described boosting and adjusts a little; Wherein,, described battery-end pressure adjusts a little when being higher than described step-down, linear voltage-stabilizing circuit work, and described Boost booster circuit is straight-through; Force down in described boosting when described battery-end and to adjust a little, described Boost booster circuit work, described linear voltage-stabilizing circuit is straight-through; Force down to adjust a little and be higher than to boost in step-down when described battery-end and adjust a little, described linear voltage-stabilizing circuit and described Boost booster circuit are all straight-through.
2. battery according to claim 1 inserts uses the buck translation circuit, it is characterized in that, described switch and linear voltage stabilization regulating element are that battery inserts metal-oxide-semiconductor (Q1), wherein, the drain electrode of described battery access metal-oxide-semiconductor (Q1) links to each other with the positive pole of battery incoming end, source electrode links to each other with the input of Boost booster circuit, grid links to each other with the control output of linear voltage stabilization control circuit (41).
3. battery according to claim 1 and 2 inserts and uses the buck translation circuit, it is characterized in that, is parallel with first electrochemical capacitor (C1) between the input of the output of described linear voltage-stabilizing circuit (4) and described Boost booster circuit (6).
4. dc back-up power supply device comprises that battery (1) and battery insert use the buck translation circuit, it is characterized in that described battery access comprises linear voltage-stabilizing circuit (4) and Boost booster circuit (6) with the buck translation circuit; Wherein said linear voltage-stabilizing circuit (4) comprises linear voltage stabilization control circuit (41) and switch and linear voltage stabilization regulating element, battery (1) links to each other with the input of described linear voltage-stabilizing circuit by switch and linear voltage stabilization regulating element, the output of described linear voltage-stabilizing circuit (4) links to each other with the input of described Boost booster circuit (6), and the output of described Boost booster circuit (6) is the load link; Described linear voltage-stabilizing circuit has step-down to be adjusted a little, and described Boost booster circuit has to boost to be adjusted a little, and described step-down is adjusted and a little is higher than described boosting and adjusts a little; Wherein,, described battery-end pressure adjusts a little when being higher than described step-down, linear voltage-stabilizing circuit work, and described Boost booster circuit is straight-through; Force down in described boosting when described battery-end and to adjust a little, described Boost booster circuit work, described linear voltage-stabilizing circuit is straight-through; Force down to adjust a little and be higher than to boost in step-down when described battery-end and adjust a little, described linear voltage-stabilizing circuit and described Boost booster circuit are all straight-through.
5. dc back-up power supply device according to claim 4, it is characterized in that, described switch and linear voltage stabilization regulating element are that battery inserts metal-oxide-semiconductor (Q1), wherein, the drain electrode of described battery access metal-oxide-semiconductor (Q1) links to each other with the positive pole of battery, source electrode links to each other with the input of Boost booster circuit, grid links to each other with the control output of linear voltage stabilization control circuit (41).
6. according to claim 4 or 5 described dc back-up power supply devices, it is characterized in that, be parallel with first electrochemical capacitor (C1) between the input of the output of described linear voltage-stabilizing circuit (4) and described Boost booster circuit (6).
7. a battery inserts and uses the buck converting means, comprise that battery inserts connector, coad connector and battery access buck translation circuit, it is characterized in that described battery inserts and comprises linear voltage-stabilizing circuit (4) and Boost booster circuit (6) with the buck translation circuit; Wherein said linear voltage-stabilizing circuit (4) comprises linear voltage stabilization control circuit (41) and switch and linear voltage stabilization regulating element, battery inserts connector and links to each other with the input of described linear voltage-stabilizing circuit by switch and linear voltage stabilization regulating element, the output of described linear voltage-stabilizing circuit (4) links to each other with the input of described Boost booster circuit (6), and the output of described Boost booster circuit (6) links to each other with coad connector; Described linear voltage-stabilizing circuit has step-down to be adjusted a little, and described Boost booster circuit has to boost to be adjusted a little, and described step-down is adjusted and a little is higher than described boosting and adjusts a little; Wherein,, described battery-end pressure adjusts a little when being higher than described step-down, linear voltage-stabilizing circuit work, and described Boost booster circuit is straight-through; Force down in described boosting when described battery-end and to adjust a little, described Boost booster circuit work, described linear voltage-stabilizing circuit is straight-through; Force down to adjust a little and be higher than to boost in step-down when described battery-end and adjust a little, described linear voltage-stabilizing circuit and described Boost booster circuit are all straight-through.
8. battery according to claim 7 inserts uses the buck converting means, it is characterized in that, described switch and linear voltage stabilization regulating element are that battery inserts metal-oxide-semiconductor (Q1), wherein, the drain electrode of described battery access metal-oxide-semiconductor (Q1) links to each other with the positive pole that battery inserts connector, source electrode links to each other with the input of Boost booster circuit, grid links to each other with the control output of linear voltage stabilization control circuit (41).
9. use the buck converting means according to claim 7 or 8 described batteries accesses, it is characterized in that, be parallel with first electrochemical capacitor (C1) between the input of the output of described linear voltage-stabilizing circuit (4) and described Boost booster circuit (6).
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| CN2008100656227A CN101247053B (en) | 2008-01-22 | 2008-01-22 | Battery-connected voltage-boosting and reducing converting circuit and device, DC back-up power device |
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| CN2008100656227A CN101247053B (en) | 2008-01-22 | 2008-01-22 | Battery-connected voltage-boosting and reducing converting circuit and device, DC back-up power device |
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| CN101247053B true CN101247053B (en) | 2010-10-27 |
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| CN105515382B (en) * | 2016-02-06 | 2019-04-30 | 青岛鲁渝能源科技有限公司 | A kind of controlling circuit of voltage regulation of wireless power supply system |
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